GCC 4.1[beta]

Vlad.Sharp · Posted: Fri Mar 03, 2006 6:06 pm Post subject:

GCC 4.1 finally seems to be out and stable. I know that GCC 4.0 has preliminary (unofficial) PIE and SSP support [thanks to nxsty and Sweden

] but what is the plan for GCC 4.1 PIE and SSP?

Edit: Just looked in the ebuild and it looks like split specs can be enabled. I suppose the question is - when does a stable glibc come out with support for it?

nxsty · Veteran Joined: 23 Jun 2004 Posts: 1556 Location: .se

Bob P · Posted: Fri Mar 03, 2006 6:32 pm Post subject:

just in case anyone's interested, i've built a new Rockhopper! that features the Gentoo GCC 4.1 release.
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Vlad.Sharp · Posted: Fri Mar 03, 2006 7:32 pm Post subject:

Matteo Azzali · Retired Dev Joined: 23 Sep 2004 Posts: 1133

just a note..... I tested some other flags in a discussion for blender compiling, I found that:
-fprofile-generate : didn't compile
-fwhole-program --combine : didn't compile
min-inline-recursive-probability : didn't compile

so care with these flags....
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Bob P · Posted: Sat Mar 04, 2006 12:21 am Post subject:

piwacet · Guru Joined: 30 Dec 2004 Posts: 483

I think I'll have a go at this 4.1.0 thingy.

zend

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chtephan · Posted: Sat Mar 04, 2006 10:01 am Post subject:

MSc · n00b Joined: 31 Dec 2005 Posts: 16

Even with the mask M~ gcc 4.1 seems to be "active" for distcc cross compiling (cross-i686-pc-linux-gnu/gcc-4.1.0). Emerge world tells me:

nxsty · Veteran Joined: 23 Jun 2004 Posts: 1556 Location: .se

chtephan · Posted: Sat Mar 04, 2006 10:42 am Post subject:

Yes, gcc 4.1 doesn't crash anymore when building split-specs with another compiler. But did you get the ssp spec files too?

nxsty · Veteran Joined: 23 Jun 2004 Posts: 1556 Location: .se

Patr|ck_ · n00b Joined: 09 Apr 2005 Posts: 69

Hmm, unfortunately, I can't compile gcc 4.1 on my machine, either:

metalshark · Posted: Sat Mar 04, 2006 2:35 pm Post subject: Ebuilds

The official ebuilds for gcc-4.1.0 and the SSP one posted on this site have issues compiling for me if going from a gcc3 -> gcc41 but not if going from a gcc3 -> gcc4 -> emerge -e world -> gcc41. The unoffical ebuild http://www.metalshark.co.uk/gcc.tar.bz2 doesn't suffer such issues - but is not aswell polished (uclibc fails so can't use on my Belkin router). I am sorting out the patches people have posted and the new ones in the Fedora CVS to get a non-ssp 4.1.0-r1 ebuild together with the latest set of fixes and am trying to edit the official 4.1.0 ebuild to not have issues going from gcc3. The SSP ebuilds compile but SSP doesn't seem to work for some applications (gtk, pango, glib ones) as in I can smash the stack. Things like the ice-hack patch are already in the latest version - anyone know a listing of patches that made it to save me the hassle? Also anyone know anything about writing SSP into GCC to get the SSP issues sorted for my -r2?

PS yes I did patch my toolchain eclass.
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metalshark · Posted: Sat Mar 04, 2006 2:58 pm Post subject: For the record

Just for the record - the issues I get for the official ebuild when compiling programs all mention CLK_TCK - for instance:

dirtyepic · Developer Joined: 22 Oct 2004 Posts: 1613 Location: sk.ca

StifflerStealth · l33t Joined: 03 Jul 2002 Posts: 952

metalshark · Posted: Sat Mar 04, 2006 5:44 pm Post subject: Thanks

Cheers stiff - will put up links to overlays (for apps affected by gcc-4.1.0 experimental stuff) on http://www.metalshark.co.uk/overlays from Monday (6th) as it takes time to go into portage. Got my patched -r1 finished but SSP is SOOO annoying. It segfaults on media related apps and Gnome apps seem to be Stack Smash happy. No problems for any daemons or qt/kde apps (might be nxstys and stiffs qt/kde combo). Haven't been able to check the stable SSP ebuild on SELinux as writing SELinux profiles (I use only strict) is such an immense pain (I like things simple and SELinux isn't).
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Fanatic · Posted: Sat Mar 04, 2006 6:06 pm Post subject:

So how big are the speed improvements (both compiling- and runtime-wise) compared to 3.4.x?

mafioso · Posted: Sat Mar 04, 2006 6:22 pm Post subject:

just thought id check in... just finished an emerge -e world using nxsty's latest glibc and the release of gcc-4.1.0 etc. (see sig), i was able to compile ALL 631 packages on my system and this system is faster now than ever b4 :wink:

. the only problems were ffmpeg which compiled fine after all the other packages were done, and gtkglarea which i needed an overlay for found in nesl247 latest overlay... peace
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metalshark · Posted: Sat Mar 04, 2006 6:59 pm Post subject: Patches

Will keep editing this post for CLK_TCK to CLOCKS_PER_SEC overlays (to stop thread bloat) all that I come across will also be posted on Gentoo bugs. Don't know why using LDFLAGS fixed the issues on some of my boxes (time to re-image methinks).

CLK_TCK fixed overlays:
libdc1394
scanlogd

Anyone not clued up on howto fix this issue can PM me and I'll do it for you and/or give you full instructions.
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dirtyepic · Developer Joined: 22 Oct 2004 Posts: 1613 Location: sk.ca